Roofing double-seaming machine



(No Model.) 2 Sheets-Sheet 1.

S Y BUGKMAN ROOFING DOUBLE SEAMING MACHINE.

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ATTORNE Awwi BY 2 Sheets- -Sheet 2.

(No Model.)

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ROOFING DOUBLE SEAMING MAGHINE.

Patented July 23, 1889.

UNITED STATES PATENT O FICE.

SAMUEL Y. BUCKMAN, OF PHILADELPHIA, PENNSYLVANIA.

ROOFING DOUBLE-SE AMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 407,466, dated July 23,1889.

Application filed May 15, 1889. Serial No. 310,817. (No model.)

1'0 (LZZ whom it may concern.-

Be it known that I, SAMUEL Y. BUCKMAN, a citizen of the United States,residingin the i city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Roofing Double-SeamingMachines, which improvement is fully set forth in the followingspecification and accompanying drawings.

My invention consists of improvements in roofing double-seaming machinesembodying, first, novel means for forming the standing seam of theroofing-plates; next, novel means for flattening and closing the seam ofthe plates.

Figure 1 represents a perspective view of a roofing double-seamingmachine embodying my invention. Figs. 2, 3,and 4 represent sideelevations of portions on enlarged scales. Fig. 5 represents a verticalsection of a portion of Fig. 3.

Similar letters of reference indicate corresponding parts in the severalfigures.

Referring to the drawings, A A designate two jaws having flat faces Band connected with the tongs C, which are pivoted, as at D, and providedwith handles E, whereby said jaws may be conveniently 'and properlyopened and closed.

F designates a bending-plate,which extends parallel with the jaws A A,and is mounted on the jawA by meansof ears G, which are formed with orsecured to said jaw, the plate when in normal position having itsworkingface H over the jaw A, with a space .I between them.

Formed with or secured to the plate F is a treadle K, whose connectingarms L are spread or bifurcated, so as to freely embrace the adjacentportion of the tongs 0, whereby the tongs and treadle may be manipulatedwithout interference of each other.

The operation is as follows: The jaws AA are separated, as shown in Fig.2, and the pieces of sheet metal, primarily bent as in said figure, areintroduced between the working-face of the jaw A and that of the plateF, it being noticed that the bend of one plate is longer than-that ofthe other plate, as at a. The jaw A is now closed, whereby the projecting end a of the sheet is carried between the I jaw A and plate Ftoward the jaw A, and

thus bent at a right angle, forming the standing seam b, as will be seenin Fig. 3. The jaw A is then opened and the treadle K depressed withoutotherwise changing or moving the machine, so that the plate Fadvancesagainst the standing seam and bends the same over the edge of thecontiguous bent portion of the sheet and upon the side thereof,

thus producing the seam, as illustrated in Fig. at. The plate is thenrestored to its normal position by hand or by the action of a spring N,(shown in dotted lines, Fig. 1,) and the jaws are opened, whereby themachine may be removed and operations continued at' another portion ofthe roofing. The face of the plate F is downwardly inclined when innormal position or when the movable jaw A is brought under the same andin contact with the stationary jaw A, the upper face of the said movablejaw being then at substantially a right angle with the contact-face ofthe stationary jaw, whereby an angular space is formed between themovable jaw and the bending-plate, thus preventing crimping or springingof the piece operated upon.

The bottoms of the jaws AA have connected with them the feet P, as willbe seen in Fig. 5, the same being readily applicable to and removablefrom said jaws, and may be made of any desired height relatively to theheight of the bent portions of the metal sheets to be seamed. When thefeet are removed, the previously-seamed plates, Fig. 4, may be locatedbetween the open jaws, after which the plate F is advanced, thus againbending the seamed plates and forming a double seam.

The bendingplate F is mounted on the ears G, as has been stated, saidears being open at one side, whereby the journals of said plate may bereadily introduced into and removed from said ears. When said plate isin operative position, itis retained by means of arms Q, which projectlaterally from the plate F, near the ends thereof, and bear upon theshoulder R on thesides of the adjacent cars, so as to ride over saidshoulder when the plate is rotated, limited by the stops S, thusretaining the plate in position and guiding it in its motions. The armmaybe unscrewed or unfastened, so that the plate may be detached fromthe jaws when so required.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A double-seaming machine consisting of jaws having flat faces andconnected with tongs, open ears on one of said jaws, a bending-platejournaled in said ears, detachable arms on said plate, and shoulders onthe said ears on which said arms are guided and which retain said platein said ears, said parts being combined substantially as described.

2. A double-seaming machine having jaws with tongs carrying the same,ears on one of said jaws, a bending-plate journaled in said cars, atreadle having arms connected with said plate, and a spring connectedwith the said ears and adapted to bear against the treadle or armsthereof, said parts being combined substantially as described.

3. A double-seaming machine having jaws with tongs, ears on one of saidjaws, and a bending-plate j ournaled in said ears and provided with anoperative treadle connected therewith, the said bending-plate in itsnormal position having its contact-face downwardly inclined toward themovable jaw, the upper face of the latter being at substantially a rightangle with the contact-face of the stationary jaw when closed againstit, whereby an angular space is formedbetween the bending'plate and theupper face of the movable jaw, said parts being combined substantiallyas and for the purpose set forth.

SAML. Y. BUCKMAN.

Vitnesses:

JOHN A. WIEDERsHEIM, A. P. JENNINGS.

